Paper packet



June 14, 1938. v. A. STROM 2,120,317

PAPER PACKET Filed Sept. 30, 1935 2 Sheets-Sheet l 4 INVENTOR:

VICTOR A. STRO ATTORNEY June 14, 1938. v. A. sTRoM 2,120,317

PAPER PACKET 7 Filed Sept. 30, 1935 2 Sheets-Sheet 2 INVENTOR: VICTO R A. STROM AT T'ORNEY Patented June 14, 1938 VTUNITED STATES PATENT OFFICE PAPER PACKET Victor A. Strom, Alameda, Calif. Application September 30, 1935-, Serial- No; 42,748 2 Claims. (01. assen This invention relates to improvements in paper packets and the mode of folding and sealing the same.

There are certain chemically reactive materials such as powdered hair dyes and washes containing acetic acid and the like, that are deliquescent or otherwise impractical to pack in glued envelopes.

Among the objects of this invention are to fold a single paper blank to form a container packet and seal the same without adhesives.

Another object is to provide a packet adapted to operate in automatic filling machines.

Another object is to prevent leakage of the contents through the mechanical folds and seals of the packet.

A further object is to protect the contents from moisture.

Other objects and advantages will appear as the description progresses.

In this specification and the accompanying drawings the invention is disclosed in its preferred form. It is to be understood, however, that it is not limited to this form because it may be embodied in modifications within the purview of the claims following the description.

In the two sheets of drawings:

Fig. 1 is a front view of a paper packet folded and sealed in accordance with this invention.

Fig. 2 is an enlarged detail in vertical section of the same taken on the line 11-11, Fig. 1.

Fig. 3 is a greatlyenlarged detail in cross section taken on the line IlIIII, Fig. 1.

Fig. 4 is a diagrammatic detail in front elevation of a crimping machine for sealing the folded packet.

Fig. 5 is a fragmentary detail in vertical section taken along the line V-V, Fig. 4, of the same before the crimping operation.

Fig. 6 is a plane view of a paper blank from which the packet is formed having the folding lines indicated thereon by dotted lines and the crimping lines indicated by dot-dash lines.

Fig. 7 is a plane view of the blank with the first transverse fold therein.

Fig. 8 is a similar view with the first lateral folds at the sides of the packet.

Fig. 9 is a similar view of the same with the second lateral folds which complete the container.

Fig. 10 is a reverse or front view of the completed packet.

Fig. 11 is an enlarged vertical section of the container taken on the line XIXI, Fig. 10, showing the filling spout in dotted construction.

In detail the construction illustrated in the drawings referring first to Fig. 6 comprises a rectangular blank I of the desired dimensions, in the present instance composed of waxed tissue paper. This paper, because of its glazed satinlike finish, is very difficult to operate in anautomatic packet forming, filling and crimping machine.

The paper is fed from a roll into the machine and folded first on the line 2-2, below its center so that the edge 3, lies below the top edge 4, as in Fig. 7. The folded blank is then severed from the strip and continues between rolls which compress the fold at 2-2.

The lateral margins of the folded blank are then simultaneously folded inward on the lines 5--5 and 6--6. This lays the folded margins I and 8 over the folded blank making four thicknesses of paper at these places, as in Fig. 8.

The thrice folded blank then descends into the third folding mechanism which folds the folded blank on the lines 99 and I0l0, bringing the folded edges 55 and 6-6 to the center of the container, as in Figs. 3 and 9. There are now six overlaid thicknesses of paper at each side of the container. The side edges l l and I2 of the original blank are now confined within the folds 9-9 and Ill-l0, respectively.

The container thus formed again passes downward between rolls which compress all the folded lines 5 to II], and deliver the containers seriatim to a traveling feed belt which carries them to the filling spout l3, see Fig. 11. This spout tapers downwardly and is a proper width to enter the container between the edges 3 and 4 and spread the container open and deposit the contents at therein. The upstanding margin l4 between the edges 3 and 4, stops against the spout l3 during the filling operation to insure alinement of the container with the spout.

The spout then rises and the containers advance synchronously; then the spout descends into the succeeding containers seriatim.

The upper portion of each filled container is then automatically folded over the feed plate l5 and swung into the horizontal position, see Fig..

5. This plate advances the folded top portion l1 between the lower crimping die l8 and the upper die IS. The plate then withdraws .and leaves the container held at I 8l9.

The lower die l8 then rises forcing the six overlaid thicknesses of the container into the concave face of the upper die l9 forming the center crimp 20 in the edge H of the container.

As the die I8 rises it compresses the spring 2|,

permitting the die I9 to recede until the toothed sectors 22 and 23 engage the edge l1. These sectors are pivoted at 22' and 23 on the toggle arms 24 and 25 respectively pivoted at 24' and 25' on the fixed frame 26.

The continued rise of the die I8 causes these toggles to swing outward against the tension of the springs 21 and 28, respectively, which are guided on the frame 26, see dotted lines in Fig. 4. These toothed sectors meshing with the toothed face of the die l8 crimp the top fold of the filled container and complete the sealing of the packet as in Figs. 1 and 2. These packets then pass through a printing unit and are ejected from the machine. The crimping faces of the dies l8 and I9 taper toward the edge I! of the packet so that the greater pressure is exerted at the fold I! to insure permanence of the crimp sealing.

These packets are formed, filled, sealed and printed at the rate of three thousand per hour.

said first fold; then again folded back upon itself and crimped across all of said marginal folds.

2. A paper packet comprising a blank folded back upon itself and having its lateral margins twice folded inwardly and right angularly across said first fold; then again folded back upon itself across all said marginal folds and corrugated substantially all the way across said last fold.

VICTOR A. STROM. 

